Name: __ Answer Key __ Period: _____ Date: ______Pretest: Worm Phyla

Match the term on the right with its meaning on the left.

1. __ R__ the head of a tapeworm, contains hooks A. aortic arches and suckers for attaching to host B. clitellum 2. __ S__ bristles that helps earthworms move C. complete digestive system D. crop 3. __ M__ food goes out the way it came in, mouth E. cyst leads to a gut F. elephantiasis 4. __ I__ example of a flatworm G. eye spot H. flame cell 5. __ P__ throat on worms, leads from mouth to gut I. fluke J. ganglion 6. __ A__ “hearts” that move fluids through K. gizzard segmented worms L. hookworm 7. __ B__ external structure that holds earthworms M. incomplete digestive system together during sexual reproduction N. leech 8. __ Q__ repeated structure on tapeworms that O. nephridia contains reproductive organs P. pharynx 9. __ L__ example of a roundworm Q. proglottid R. scolex 10. __ E__ hard “ball” that worms may curl up in, S. setae found in animal tissues (e.g. muscle) T. tegument 11. __ K__ muscular digestive organ in earthworms that grinds up food 12. __ J__ nerve cells that work together to control function; a primitive brain

13. __ C__ food goes in one end and out the other, mouth leads to gut leads to anus 14. __ O__ excretory organs, primitive kidneys

15. __ H__ structures that help remove water from flatworm cells

16. __ N__ example of a segmented worm 17. __ D__ storage area for food before entering the digestive system

18. __ G__ light sensitive area on Planaria spp

19. __ F__ swelling due to worm infections

20. __ T__ outer layer that protects some worms from host’s immune system

Here are some pictures of some simple animals. Use the word bank to label them. Letters may be used once, more than once or not at all

21. __ J__ 25. __ M__ (whole structure)

22. __ E__

26. __ L__ (whole 23. __ F__ structure)

24. __ K__ Phylum to which above 27. __ K__ Phylum to which above organism belongs organism belongs

28. __ B__

29. __ _ J

30. __ F__ 34. _C__

33. __ __ I 32. __ G__ 31. __ D__

35. __ A__ Phylum to which above organism belongs

A. annelid B. aortic arches C. clitellum D. crop E. eye spot F. ganglia G. gizzard H. nematode I. nephridia J. pharynx K. platyhleminthes L. proglottid M. scolex

36. What advantages does segmentation provide? Better movement…segments can move independently, rather than whole animal having to move at once Repeat of vital organs, e.g. several hearts, nephridia, reproductive organs, so if some are injured, organism does not die

Place a F by the statements that apply to Flat worms Place a R by the ones that apply to Round worms Place a S by the ones that apply to Segmented worms You can put more than 1 letter by each statement, or leave it blank if it doesn’t apply to any.

37. ____ R_____ Tricinellla spp, Ascaris spp 38. __ R,F,S __ invertebrate

39. ____ F_____ flame cells 40. ____ S_____ leeches

41. _____ S____ setae 42. _____ S____ earthworm

43. ____ F_____ flukes 44. __ F,R,S _ bilateral symmetry

45. __ F,R,S __ closed circulatory system 46. ____ S____ nephridia

47. ____ F_____ Platyhelminthes 48. ____ F____ Planaria spp

49. ____ F_____ incomplete digestive system 50. _F,R,S breathe through skin

51. __F,R,S __ hermaphroditic 52. _F,R,S _ cephalization

53. __ F,R,S __ cerebral ganglia 54. ____ F_____ scolex/proglottid

55. _F,R,S _ parasites 56. ______exoskeleton 57. ____ F_____ tapeworm 58. __F,R,S __ eggs & sperm

59. ___ R,S ___ complete digestive system 60. ____ R__ Hookworms, Pinworms

61._____ R____ elephantiasis

One big difference between flatworms and roundworms/segmented worms is the development of their body systems. Briefly describe the following systems: System Flatworms Roundworms Seg mented worms Nervous ganglia, nerves ganglia, ganglia, nerves nerves Digestive incomplete complete complete

Circulatory with digestive separate, separate, closed closed Reproductive Hermaphroditic , Sep. sexes, Hermaphroditic , internal fert. internal internal fert. fert. Excretory through nephridia, nephridia, anus skin/gut anus

77. – 82. Name any two parasitic worm infections. Describe the organism, symptoms and body part where the worm is. Flukes…flatworms, live in blood, intestines, liver, lungs … block blood vessels (e.g. schistosomiasis) Tapeworm…flatworm, intestines, absorbs food Ascaris…roundworm…intestines, lungs throat…block air passages Hookworms…roundworm…intestines…feed on blood Trichinella...roundworm, muscle…muscle pain, stiffness Pinworm…roundworm…lower intestine…no real harm Filarial…roundworm…lymph system…elephantiasis (heartworms) Leeches…segmented worms…ectoparasite…sucks blood